Updated to pybench 2.0.

See svn.python.org/external/pybench-2.0 for the original import of that
version.

Note that platform.py was not copied over from pybench-2.0 since
it is already part of Python 2.5.
diff --git a/Tools/pybench/Strings.py b/Tools/pybench/Strings.py
index b01843a..3be8b35 100644
--- a/Tools/pybench/Strings.py
+++ b/Tools/pybench/Strings.py
@@ -3,9 +3,9 @@
 
 class ConcatStrings(Test):
 
-    version = 0.1
+    version = 2.0
     operations = 10 * 5
-    rounds = 60000
+    rounds = 100000
 
     def test(self):
 
@@ -85,7 +85,7 @@
 
 class CompareStrings(Test):
 
-    version = 0.2
+    version = 2.0
     operations = 10 * 5
     rounds = 200000
 
@@ -167,9 +167,9 @@
 
 class CompareInternedStrings(Test):
 
-    version = 0.1
+    version = 2.0
     operations = 10 * 5
-    rounds = 200000
+    rounds = 300000
 
     def test(self):
 
@@ -249,9 +249,9 @@
 
 class CreateStringsWithConcat(Test):
 
-    version = 0.1
+    version = 2.0
     operations = 10 * 5
-    rounds = 80000
+    rounds = 200000
 
     def test(self):
 
@@ -324,9 +324,9 @@
 
 class StringSlicing(Test):
 
-    version = 0.1
+    version = 2.0
     operations = 5 * 7
-    rounds = 100000
+    rounds = 160000
 
     def test(self):
 
@@ -387,7 +387,7 @@
 
     class StringMappings(Test):
 
-        version = 0.1
+        version = 2.0
         operations = 3 * (5 + 4 + 2 + 1)
         rounds = 70000
 
@@ -460,9 +460,9 @@
 
     class StringPredicates(Test):
 
-        version = 0.1
+        version = 2.0
         operations = 10 * 7
-        rounds = 80000
+        rounds = 100000
 
         def test(self):